| Rotherwick Compliance Consultants Limited | Professional & scientific | 2021 |
| Rothwell Media Ltd | Professional & scientific | 2012 |
| Rothwyn Limited | Real estate | 2025 |
| Rowland & Associates Limited | Health & social care | 2002 |
| RPM Business Strategies Ltd | Professional & scientific | 2017 |
| RS Design & Installation Services Limited | Manufacturing | 2022 |
| Rubanite Productions Ltd | Arts & recreation | 2025 |
| Rumsby Homes Limited | Construction | 2005 |
| Rumsby Investments Limited | Real estate | 2020 |
| Rural Fringe Limited | Other services | 2015 |
| Rural Hart Association | Professional & scientific | 2019 |
| Russell Lakes Limited | Real estate | 2024 |
| Russell Powerboats Limited | Arts & recreation | 2018 |
| Russell Residences Limited | Real estate | 2024 |
| Rusty Strut Ltd | Wholesale & retail | 2023 |
| S M Carter Ltd | Professional & scientific | 2017 |
| S R Hall Limited | Construction | 2002 |
| S Zuegel Limited | Professional & scientific | 2016 |
| S. F. Jenkins & SON Limited | Real estate | 1961 |
| S.V. Construction of Building Limited | Construction | 2018 |
| S1C Consulting Limited | Professional & scientific | 2023 |
| S4 Financial Limited | Professional & scientific | 2004 |
| S5 Commercial Investments Ltd | Real estate | 2022 |
| SA Holdings Hook Limited | Real estate | 2023 |
| Safari Engineering Ltd. | Wholesale & retail | 1994 |
| Safari Firewood UK Ltd | Wholesale & retail | 2025 |
| Safe Hands Bookkeeping Ltd | Professional & scientific | 2022 |
| Safe Hands Hartley Wintney Ltd | Administrative & support | 2020 |
| Safe Hands Pangbourne Ltd | Administrative & support | 2022 |
| Safeguard Claims Management Ltd | Financial services | 2012 |
| Saffa Trade Ltd | Wholesale & retail | 2025 |
| Sage Advice From the Financial Wizard Limited | Professional & scientific | 2020 |
| Sage Voice Limited | Administrative & support | 2015 |
| Sahsof Ltd | Professional & scientific | 2011 |
| Saif AI Ltd | Information & communication | 2020 |
| Saint Dionis Properties Limited | Households | 2020 |
| Saint Removals Ltd | Transport & logistics | 2021 |
| Sainted Properties Ltd | Real estate | 2020 |
| Sanctuary Place (Hartley Wintney) Limited | Households | 2002 |
| Sapienza Consulting Limited | Professional & scientific | 1994 |
| Sarah Anne Brown Ltd | Information & communication | 2012 |
| Saris Building Services Ltd | Construction | 2026 |
| Savi Enterprises Limited | Real estate | 2021 |
| Savvy Accountancy Ltd | Professional & scientific | 2013 |
| Sawl Ltd | Wholesale & retail | 2024 |
| SBS Renovation Ltd | Construction | 2015 |
| Sceptre Investment Management Limited | Professional & scientific | 2020 |
| Scott Path Limited | Health & social care | 2023 |
| SDM Joinery Hook Limited | Construction | 2014 |
| Seaflow Studio Limited | Professional & scientific | 2023 |
| Searsons Wine Merchants Limited | Wholesale & retail | 2019 |
| Seasons Health Care Limited | Health & social care | 2023 |
| Security Services Hants Ltd | Administrative & support | 2023 |
| Securus Communications Ltd | Information & communication | 2012 |
| Securus Technology Group Ltd | Information & communication | 2018 |
| Securus Technology Ltd | Extraterritorial | 2023 |
| Securus Voice Services Limited | Information & communication | 2018 |
| Semitronics Limited | Extraterritorial | 2003 |
| Sensible Automotive Limited | Transport & logistics | 1994 |
| Serco Ferries (HR) Limited | Transport & logistics | 2012 |
| Serco Leisure Operating Limited | Arts & recreation | 2003 |
| Serendipity (Hampshire) Ltd | Real estate | 2011 |
| Serodio Consulting Limited | Wholesale & retail | 2024 |
| Servaro Networks Limited | Construction | 2025 |
| Services WGR Ltd | Wholesale & retail | 2023 |
| Servo Ltd | Wholesale & retail | 2020 |
| Shapley House Residents Association Limited | Households | 1992 |
| Shared Services Professionals Limited | Professional & scientific | 2011 |
| Shell Seekers Limited | Administrative & support | 1990 |
| Shella Consulting Ltd | Professional & scientific | 2021 |
| Sherfield Park Management Company Limited | Households | 2007 |
| Sherfield School Limited | Education | 2003 |
| Sherfield Village Brewery Limited | Manufacturing | 2010 |
| Sheridan Executive Limited | Administrative & support | 2023 |
| Shield Commercial Solutions Ltd | Information & communication | 2018 |
| Shine Creative Limited | Professional & scientific | 2000 |
| Shisho Data Limited | Professional & scientific | 2023 |
| Showboat Sandbanks (Management) Limited | Real estate | 1991 |
| Shreem Property Ventures Limited | Real estate | 2024 |
| Shripati E-Store Ltd | Wholesale & retail | 2024 |
| Sibe Limited | Administrative & support | 2020 |
| Sibson Carlisle Limited | Administrative & support | 2003 |
| Sidhu & Sons Enterprise Ltd | Financial services | 2020 |
| Sidhu G Properties Ltd | Real estate | 2024 |
| Sidhu G & Co Ltd | Hospitality | 2020 |
| Signs and Labels Direct Limited | Manufacturing | 2012 |
| Silver TIP Warbirds Ltd | Administrative & support | 2019 |
| Silverstreak Studio Ltd | Information & communication | 2024 |
| Silvertiger Logistics Limited | Transport & logistics | 2017 |
| Simon Drabble Cars Ltd | Wholesale & retail | 2023 |
| Simon Drabble Limited | Financial services | 2025 |
| Simon Drabble Promotions Limited | Information & communication | 2025 |
| Simon Hunt (Strategic Services) Limited | Mining & quarrying | 1996 |
| Simply Homes (Nationwide) Ltd | Real estate | 2024 |
| Simply Homeware Ltd | Wholesale & retail | 2017 |
| Sinclair Consultants Ltd | Administrative & support | 2010 |
| Sino Bridge U.K. Limited | Information & communication | 2017 |
| SIR Cranwell Consulting Limited | Information & communication | 2024 |
| SIX Wide Limited | Wholesale & retail | 2017 |
| SJ Tax Consulting Limited | Professional & scientific | 2017 |